code: def get_search_generation_opt_mutators(opt: Opt):
      mutators = "+".join(
          ["prefix_speakers_opt", "format_gen_tasks_for_decoder_only"]
      )
      if opt.get("mutators"):
          mutators = "+".join([opt["mutators"], mutators])
      logging.warning(f"overriding mutators to {mutators}")
      return mutators
  
file_path: ParlAI/projects/bb3/tasks/opt_search_generation_tasks.py
imports: from parlai.core.opt import Opt
  import parlai.utils.logging
  from projects.bb3.tasks.r2c2_search_generation_tasks import FitsSearchQueryTeacher, WoiSearchQueryTeacher
label_desc: Use image node_id 1 for calling a global function with example usage: get_search_generation_opt_mutators(opt) and returns: mutators